—You know our manager has been in hospital for days?— Yes. I wonder if he is ____ better now. 

Smoking is one of the ________causes of cancer，killing millions of people each year. 

 With the weather getting colder, visitors from Australia spent their _____ days in 　　　　Beijing.

．After a long walk, the little boy got home at last, ________.

The advantages of living outside campus are ________. Students who live outside can enjoy more freedom and have more independence.